Nan (Orange County)
Florida LAKEWATCH Water Chemistry Summary
Location: Latitude 28°36'27", Longitude 81°16'52"
Period of record: 79 sampling dates; July 12, 1992 to June 5, 1999
Surface area (Shafer et al. 1986): 28 acres / 11 hectacres
Lake Region (Griffith et al. 1997): Orlando Ridge
Geologic formation (Brooks 1981):
The geology is dominated by coastal sand and shelly silty sand of the preglacial Pleistocene.
Physiographic region (Brooks 1981):
The water body lies in the Holopaw-Indian Town Ridges and Swales division of the Eastern Flatwoods District.
Supplemental, unpublished water chemistry data, University of Florida.
Numbers reported below are the average for 1 month sampled:
|
pH |
7.8 |
Total alkalinity (mg/L as CaCO3) |
38.0 |
|
Conductance (µS/cm @ 25 °C) |
171 |
Color (Pt-Co units) |
9 |
|
Chloride (mg/L) |
21.0 |
|
|
Long-term Florida LAKEWATCH Data
Numbers reported below are the minimum, average, and maximum value for the 79 months sampled:
|
|
Minimum |
Average |
Maximum |
|
Long-term total phosphorus concentrations (µg/L) |
12 |
16 |
24 |
|
Long-term total nitrogen concentrations (µg/L) |
340 |
460 |
620 |
|
Long-term total chlorophyll concentrations (µg/L) |
4.3 |
9.9 |
21.7 |
|
Long-term Secchi depth (ft) |
4.0 |
6.3 |
9.5 |
1999 Florida LAKEWATCH Data
Numbers reported below are monthly averages calculated from 3 stations for total phosphorus (TP, µg/L), total nitrogen (TN, µg/L), chlorophyll (CHL, µg/L) and Secchi depth (SECCHI, ft) during 1999:
|
Date |
TP (µg/L) |
TN (µg/L) |
CHL (µg/L) |
SECCHI (ft |
|
Jan-26-99 |
12 |
470 |
8.7 |
6.5 |
|
Feb-24-99 |
14 |
480 |
11.0 |
6.0 |
|
Mar-17-99 |
15 |
510 |
8.0 |
6.7 |
|
Apr-14-99 |
15 |
470 |
6.7 |
6.8 |
|
Jun-05-99 |
18 |
560 |
6.3 |
6.4 |
|
|
|
|
|
|
|
1999 Average |
15 |
500 |
8.1 |
6.5 |